Add list with all the files in the upload queue

[homonecloco]

When selecting multiple files, the previous release showed all the files pending to upload. The current version only shows whatever file is being currently uploaded and what is done. When adding several files at the same time, you have to remember which files where already sent to upload.

[homonecloco]

@shaw2thefloor I see this with Firefox and Safari. My use case is like this:

I have 61 folders with anything between 4 and 12 fastq.gz files on each. I select 4 from one folder, then another 4 from the next on and so on. They seem to work fine for some time, and suddenly they fail. Since I can't see which are the files that are being updated, I can't tell which is the file that failed and from where I need to resume the download. On the previous version of the upload system the error would happen, but the rest of the downloads worked. So at the end I could ask @tonietuk for the list of files and compare. It would be nice to have a list with all the files that failed in the upload.